If you get an alt able to feed all the car needs, the battery will barelly supply loads, so the alternator load will remain steady at the same car demand, meaning that EVEN THE WEAK BULKHEAD TERMINALS could hold the load on a basic equipmed car. So, yes, wiring and terninals must be addressed based on car needs ( considering stock and new accesories ) or, after all these years of abuse and bad use at least mantenience, BUT first the alt must be upgraded to be able to suply all the power at any speed, keeping the batt out of the game most of the time as posible.
I'm sorry, but unless we are misunderstanding each other, I disagree with the above. If, for example, someone adds loads to their system to increase it to a demand of 50 Amps, and they have an alternator that can supply 50 Amps, then all those 50 Amps will travel through the bulkhead connector. Yes, it is true that the battery will barely be in scope here, and little current will travel out of the bulkhead and charge the battery. But on stock Mopar wiring all the load provided by the alternator goes through ONE wire through the bulkhead, and this wire (and connector) will supply those 50 Amps.